Machine for making corrugated fasteners



Sept. 4', 1928,

C. O. SWENSON MACHINE FOR MAKING CORRUGATED FASTENERS Filed Oct. 9, 1924 4 Sheets-Sheet ovue Sept. 4, 1928.

C. O. SWENSON MACHINE FOR MAKING CORRUGATED FASTENERS Filed 0013. 9, 1924 4 Sheets-Sheet 2,

iii

Sept, 4, 1928.

1,682,862 C. Q. SWENSON MACHINE FOR MAKING CORRUGATED FASTENERS Filed Oct. 9, 1924 4 Sheets-Sheet 3 4 Vi I 141, 1 16 in 105 1 1/ 3 2/15 IHUFL i Q3 Sept. 4, 1928.

C. O. SWENSON MACHINE FOR MAKING CORRUGATED FASTENERS Filed lot. 9, 1924- 4 Sheets-Sheet UQ NQN i [2212/ 951mm w v invention Patented Sept. 4, 1928.

mm rse STATES eAr iQFF-TCE.

eann oisvinnson; enemas-e0, r'LLtnois,

es's'reinos 'meesserinrem STEEL STRAP- "rrn'e CLE'M PAfiY; 01" CHICAGO, insurers, A cos-Possum on DELAWARE.

MACHINE son CORRUGATED FASTENERS.

Application filed "October 9, 1924. Serial No. 742 642.

My invention relates to the manufacture of corrugated saw tooth fasteners such as are used in the manufacture of door and window sashes, barrel ends. packing boxes,

' etc Generally stat-ed, infinvention content art is replatewith ways and means for. re-' moving o1'--operating upon the burrs and uneven throats after the milling operation has-been completed; butnowhere in the prior art do I find any machine which will mill saw teeth on a'c-orrugated strip without leav ing such burrs, uneven throats and other irregularities. l

The present machine utilizes a new and improved method ot-forming teeth in the corrugated fastener, which method I have made the subject-matter of a separate oompanion application Serial No. 74:2,6el3 filed Oct. 9,1924. a

Referring to the accompanying drawings illustrating, a preferred embodiment of my Figure l is a plan view of the machine, apart thereof being broken away 1n section to illustrate someof the details;

Figure 2 is a fragmentary elevational view of the front of the machine, viewed from the plane 22 of Figure 1 Figure 3 is a horizontal sectional view taken through the supporting base and looking upwards;

Figure 4 is a detail sectional view, taken on the plane of the line k4 of Figure 2;

a Figure 5 is a-vertical se'Ctionaivie-w taken on the planes 55 of Figures 1 and 3;

Figure 6 is a transverse sectional view tulren on the plane 66 of Figure 1;

Figure 7 is a transverse sectional. view taken through the entire machine on the plane of the line 77 of Figure I;

Figure 8 is a fragmentary View in greater detail showing: the milling cutter and back ing wheel. in the pertormanee of a million operaiii-en Figures 9 and 10 are side ele'vation'aland transverse sectional views, re'spect-i'vely of the finished fastener strip.

V The several operating partsare assembled on a supporting base 15. which may be in the form of a rectangular box-like casting con1+ prising side walls 16 provided with a flange around the bottom (not shown) by which the machine may be bolted to the fio'or; or

which be in the "form of'an upper table" portion supported by legs. For convenience of reference I shall hereinafter refer tothe right-hand portion of the machine, viewed from the plane-22 of the machine.

The top of the base castingifooi'npris'esin the main a fiat table'surface 17 from wh-ihh rises an elevated table portion 18 adjacent the front of the machine. -A raised flange 19 extends around the front and sideso-f the table surface to formin effect a' pan around thet'wo milling cutters to retain the metal scrap'cut in the niilling operations Any suitable arrangement of pockets or air chutes may be employed for earirying away the of Figure 1; as the front chips. This marginal flange 19 megs at the sides of the mao'hine into afiange 21 which extends ClOSSWlSe of the tablefrom s deto sidethere'of and forms the rear wall of the rei'sedftable portion 18. This table portion 18-"supports the corrugating-and backing wheels which I shall presently describe. A V i 1 The rear side of the transverse flhnge 21 is formed with a dovetail guide's'urfiice fiif" for receiving the correspondingly inelined forward edges of twovbase plates 23- (Figure 5 These-base plates are located on the right and left hand sides of the machine,

and mount: individual bearing supports for the two niilli-nacutters which lie toe'aeh side the raised table portion 18. The forwardedg'es ot-bot-h base plates rest on theliorizontal' flange'25, which forms part ofihe dovetail groove 22. and the rear edges" thereof rest on bearing plates 1 26 secured by p'insQ'? and screws 28' to the; table we 17 Mounted on the slidalole base plates 23",. and secured thereto by screws 31"are the mov'able bearing snpports32' for the two Iniliing critters. Each bearing support forms a complete mounting tinit for its'assoelatediniiling cutter and arbor arid-a liens: ng for the gearw'h'ich drives ihefi i tti; These heeri ngstipprts eeiesesieeg their inner sidesintoupper 'andlo'wer clamps ing portions 33 and 34: which are adapted Gto be drawn together byrcapv screws 35.

Formed in each bearing supportare front and 'rear'beari'ngs-36 and :37 for mounting the cutter arbor. g The two millingcutters 3838? arereach rigidly mounted on an. arbor 39 lhavinga V journal portion 40 extending into the front 7 bearing36. This journal portion is mounted in spacedbearing sleeves ll-which are sup-I; ported in aushiftable sleeve142, this shift-j able sleeve being non-rotatable in-the bearing 36,1'but having endwise slidingfmotion thereinri At the rear of this journal portion 39 is a reduced portion 431 011 which is se cured a wide-faced spur gear i A ,nut

v of the arbor portion? ofthe bearing- 45 is-screwed over the threaded portion lfi to-hold thegear/l4 againstthe shoulder at the endof thejournal' portion 39 of the arbolx. A-still smaller reduced portion 437 at the rear-end of the arbor has bearing support in-a sleeve 48 carried in the rear bearing- 37. A cap-49 fits.,;o'ver the projecting end and closes: this end Referring to Figure i6', "it willbe observed that the outer side :of each bearing support isalsodi vided llltO'ftlPPGIflllCl lowerclamp- [ingport1ons33i and. 34'', between which is clamped a section of heavy shaft orcircular bar 53. 'Cap screws'35 also pass {downthrough this'side of the 'casting for drawing the clamping portions 33- and 34 into rigid i engagement with, this shaft member 53;

Thisshaft is adapted toserve as ashiftable 39. By loosening the three, cap screws 35,

I a the milling'cutter arbor 39 "and the shaft. section 53can be released for longitudinal sliding motion in their 'mountingsbetween the-clamping portions 33- 34 and 33'34-. This permits the shaft section to slidewith the milling cutter when the latter is shifted longitudinally. VI shall now' describe the purpose and manner of-securingthis longi tudinalshifting ofeach milling'cutter. ,i The milling cutters 3838 cooperate with individual backing wheels 6l' 6l supported above the elevated table portion 18. The V corrugatedfstrip is guided around the'se back ,ing Wheels .6 l6l",*.as I shall hereinafter describe, and" the milling cutters out first one side and then the other-of the strip: 7 along its upperedge. In performingthis? operation, the cutters are disposed substan tially intersecting the backingjwheelstan necessary; :The :tightening of: the cap shiftable Q'slee ve 42. 'gMeshing these; teeth is a longqspurgear?63' mountedfon a" vanco'd forwardly or backwardlyitojany de sired position! After the milling-1 cutter has been plac'edin'jitis forwardfordesired operatjtilinear movement of the-gear 444withfthe 38+3 8 towards "or away? from its respective backingfw'heel 61 61; {This 'is the purpose.

interposed between the "sloped surface 72 and 7 applied to the'nwedge, plate 75 for holding gentially thereof .f and con seque'n'tlj v a'only a :7

'relatively short length of cutter face is *employedQ As this portion of the-cutter; face becomes dullthe cutter can be' 'shifted I axially-to jpresent another portion ,of its} linear face'at the 'point-of cutting. Thus f l; 7;

each milling. cutter-will, give a. relatively I long period of service-before removal is screws 35after an adjustment of the-cutter I lockstheshiftable sleeve 42 and shaftsection 1 53 in rigi'dlpositionf I 'i 1' j 5 Forsec uring-this' longitudinal shifting motio'n'; of each; 1nilling putter, Ifhaveprof vided rack teeth:62'in the outerisi'deof each-p vertical 'o peratingishaft' -64. This shaft has bearingsupport belowthegea'r in 'a-bore-65, a and above the' gear it passes through abearg ing cap 66rwhich isjsecuredito the. housing s cover 34 by cap screws67. Asquared-shanli 6 8 on the upper end "of the shaft isadapted' for the reception'of a suitable rench by-[E- which the milling cutter and the,;shaft 531; which supports the end bearingfcan be ad-*- ing position the cap screws 1 35 are tightene v to rigidly. lampthe-s'haft section 53 and;al'soj to clamp -the shiftable s'leeveil2.,{ ilv It will be noted from Figure5Y that, the? wide-faced gear fie, 'in each milling cutter; unit 32, projectsdown'through an opening] 69 in the bottom of the supportingunit32 and intoan Opening'a'YL-jin the dovetailed." slide 1 pl ate '-23.;F- Thesej' openings 6'9 and 71;; are sufficiently longto accommoda-te therec;

shifting .of the milling cutter38; f" 4 1 .In order togau'ge the d' 'pth' of cut o f e;ioh milling cutter, It-have. false mountedeach I supporting'unit 32 for amotion-transverselyvof the machineltoimove each milling cutter? of the slidable mountingjof the-plate 23 ini' the dovetail;groove'22:j The -opposite edge of the plate 23 alsoihas acorresp'onding slope f 72 adapted to o0oper'ate"with fa wedgeiblock 73. This Wedgeblock'has a right angle re? cess extending over a right -angle shoulder 74 extendin'g along the rear edge of the mounting V plate 26. 1 A wedge s plate 75 Sis" 1 the wedge'block 73; and a manually operable screw TGthreadingthrough thewedgebloclc 7 3 enables a: firm cla mp'ing .pressuretofbe the supporting unit 32 in ti'on in-itsguide 22. i p i i This lateral" shifting of: each-supporting unit is secured by."inclividua-l adjusting screws 30 having Outer "ratchet levers A0.

an y'ia djusted p'osij messes tted to each milling cutt r 11 1 ease H -i i ia 2ll.1. s has with t ge The gear. 77 is mounted on a: short driye yhi chrissupported in bearings 79 .and 81 on each side of the gear. The gear 7 is confined against lateralnioye- In l fe bi t g ving to the avide face of the'gear 14, this latter. gear remains in mesh with the gear Z7 in alliongitudinal positions -,of the critter 33. On the forward end of each shaft 78 mounted a bevel gear 82 iyliic h meshes with the hex el pinion 83 on the transiersepoxver shaft. 851. The bearass 7 of hangers depending; from the supporting unit through the openings 70 and 71 so 78 and gear 77 will move witl the unit in any transverse adjustment or en ,this nit. in its guide 22.

iusi ant f 1 11 111111 v32, r t e bevel einiea 3-11%.Yh5 rq eh i ate p eps 111E511 wi h hat 9 seaweed than ig y se its shaft after such adjustment .of the sapne tins-iin t 2- .plt nsillbe noted am sur e that the two bevel pinions mesh xvith opposite sides their respective bevel gears 82so. to drive themilling cutters in opposite directions. This gives the desired dpivnwar'd cut by each -rnilling cutter on its Part cular de at he .w r s p- The-12 W Shaft ishe b ing suppor at it nds i bearin s 6 w ch ar b d n the d w ll 1 e base pa n ee F e-F3) was a the-sha t 8 1 extended beyond its bearing 86 forsupporting heibs -zpelley thrqush h ch ra smit d the achine The shaft meyalse ha ad eal b a i' s uppart in 1., 1. .,n?n a .'l y wm t e slidahle plates through the, openings 7 0.

lists-r descr bing in det i the drive mechanism for the corrugating and hacking Whee l ha l trace h pa r t t e s r il through and around these Wheels. In its i i al erm, he astene m ltfi ml ns sts of a metall c strap is wh ch is fed to the l 0.1 1 ch n a supply reel, n t;

shown. The strip first enters a gnide 91 wh is be ted the ront dge @fthe ais l ta le po t 8- h s guid 0.11 priSQS a pair of g uide jaws 92 and These jaws may benlgged together under an adjustable spring pressure, whereby the 'jaws may function astspring tension mean torsadjustalplv tensioning the -feed ofthe strip. From thisguide the strip passes bee.

tween a pair o-fcorrngating Wheels which ar uupnorted ab? e the eleva ed table surface s;

Thesesvhe' shave; toothed 136:

9 and S1 are preferably in the formllhe play between the bevel gears 82 ai d .3-a liiseellr-e emm te are l aovver is 115 formed in. a remove a partial turn around the first backing;

Wheel 61. The first milling operation is performed while the corrugated strip is backed up by this Wi'ieel.- and While it is moving in the curved path defined by this Wheel. From this Wheel, the strip led forwardly around the front of the companion Wheel 61. This latter vneel performs the same function the first Wheel 61 in backing up the strip and guiding it in a curved path past the other milling cutter 38, for the, performance of the second cutting operation. It will be noted thatthis second cutting operationis performed on the opposite side of the strip from that cut by the first cutter 38. Both Wheels have teeth closely fitting the corrugations in the strip for giving firm supportto the reverse side of the strip in each cutt ng operation. I shall describe these t' 3; operations in greater detail in the lat e part of the description.

the finished strip is led The Will be noted that extending. forwardly from the power shaft 8 1, loeloiv the top of the base casting, are two parallel shafts 9? and 98. The first shaft 97 carries a bevel gear 99 which meshes With a bevel ear 101 on the power shaft 8 1. Both sham 97 and 98 having bearing; support in two bearing hangers 102 and 103 which extend crossiv of the machine,.and which have feet 101 bolted or screwedto. the underside of the table top 17. The rear hanger 102 has spaced hearing arms 106 and 10Ttfor the first shaft 97, 7 also has spaced bearing arms 108 and 109 for the second shaft 98. The front hanger 103 has a single bearing 111 for the nrst shaft 97, or its continuation 97, and has two spaced bearings 112 and 113 for the second shaft 98. The forward ends of both shafts also extend throu h bearings 11% and le front plate 116.

This front plate sets in an ope g 117 in companion dge 'of the machine to a guiding the and lib

"The second shaft 98 hasa direct geared;

connection'with the corrugating and backing parts ofthe machine. As an alternative-arrangein'ent, itinay be desirable insoine in stances to be able to change the rat o of the feeding speed of the strip relative to .the'

i l tothe speed of the cutters.

- Any suitable clutch may be'employed for V terposed in the shaft 97 "so thatdisenga V m'ent thereof will stop operation of. the corspeed 'of the-ciittersthrough one or more changes. Forthissituation I contemplate interposing'a systemrof change feed'gearing 101- between' the driving shaft 97 andthe driven shaft 98f By the provision of this changefeedgearinglthe feeding rate of both the corrugating andb acking ivlieelscan 'be" variedthrough a' plurahty of steps relative controlling the operation "offt-hemachine; Forexainple the clutch maybe associated with the driving pulley 8'7, orinterposed-in the shaft 84 between this pulley and the first 1 gear 83 so that disengagement thereof will '1: stop operation of the milling cutters andthe: feeding wheels. Or-the clutchmay be rugating and backing wheels but will leave the milling cutters running; As illustrative of the latter location I have'shown a clutch 1 v 122 interposed in the first drive-shaft 97 one the power side of the change feed when such gearing is'employed. c

Any suitable design of clutch maybe em 1 gearing,

)lo ed such as;a. friction clutch an over-f p 7 7 running rollerclutch, fete, that shown in Figure '4 being an overrunning-roller clutch; This form' of clutch generally :comprises a driving element 123 and a driven-elemcnt'12 l 1 with suitable interposed clutching means adapted to. carrythe ox' errunning rollersj The shaft 97 terminates at this clutch, a

continuation thereof 97 fexten ding; forwardly through the bearing 111'foreffectingdriving connection with the changefeed gearing 121; The clutch member-123 keyed to the rear shaft portion 97, and the clutch member 2 124: is keyedto the front shaft isection' 97."

latter is swung into the path ef'th-e stop carried by the hangerQZOB An operating A. stop finger 127 projects from the periphery of a control. element 125 whichvco ntrols the operation of the clutch, this finger being, adapted to strike asto p'arm' 128-.whenthe finger 127. This stop arm-128 is fixed to the end f a clutch operating shaft 129,- which ext-ends forwardly through the re-I movable front plate 116 Land-has bearing] support in thisplate an'din a bearing 180 shaft 97 Q '7 Extending throughbearingi hubs.

sleeve 139, but the -y0ke'134 is freetoswing:

graduated sizes. WVhen-iti is desired 1 to 1 p imed in jmshi with the-largest v viously the' numberof'speed selecting gears] from this plate 147 is a hub-148 having lever13l is secured to thefront' end of this; control shaft; and it will be apparent that p f, by the 'o'scillation'oflthis' lever the 'drive'tof the corrugating and backing wheels may--be1 interrupted or:connectedjat any time i There the change feed" gearing :l2lis em-f' ployed,"the san1e comprises a spur gear 132- which is mounted'on the shaftextension 97 between the hubs 133 of a yoke 134. i This yoke is free to swing concentrically of' the-iv" in' thelower jend of thisyoke isa F'Sliaft'135 on which is journalled,betweenthe 7 arms; of l the yoke, a gear 136fwhich meshjesiwithfthe gear 13 2.v The shaft islseeur'ed fast'fi-n the yoke 134, and extends forwardly through an" arcuate slot 137: inj'the removable: front; plate 116. Driving-connection? between the shaft section 97 and thegear132jisgestablished through a long'ikey1'38 'engagin gin' key slot in a driving; sleeve "139. 5 The gear 132 is compelled-to rotate with this driving on the driving sleevefThe key and 'driving sleeve thus maintain driving"connectionwith the gear 132'when the yoke'andggear are slid endwise aloiigthe shaft 97 in" making. v the different gear SeleCtiOn'S-YyvhiGhIIjsha1l,

nowde'scribe' g vi "1 1 "Mounted onthe other shaft'98fare three 'i spur gears 1 1:1, 142, andf143 0f suitably-f transmit a relatively slow mauve speed gto' I: the 'cor-rugating' and backing'l fwheels; the

gear 143. Forhigher rotative*speeds,-the gear-136' may be placed ,selectivelyin mesh witheither of the "gears 142 and 141; Ob-f.

may be increased or diminished tosuit any requirements.' 'ji A ball endl lt on the end of theIs'haftf135j r affords ahandle through which theyoke134f j togetherwith"itsgears 132*anjd 136,- can be 7 shifted into the, plzirieofeither-of the-gears 141' to 14=3, the shaft 135" having annular marking grooves 145 toindicatethe selected 2 speed; and also having aCstopeollargl lfiz l limiting theinwardmovement of thdshiftf 1 hen the gear 136' has been brough'tlinto i the plane of either selected" gear 141-, 1423 V or 143, the yoke must beswung' 1aterally"'to1 5' r bring'the gear 136 into mesh with these- 1 lected gear. fThis' is provided: for by an arcuate plate l i'Z'which affordssupport for the outer end of the shaft 135 and' is'freei If: to swing in the arcuate-slot l37; -Dependi sleeve extension 149 in whichgishousedfa locking plunger 2151. The'plunger is nor-c mallyurgedinto any one of a series of lockv ing hole's"l52-in the face-of the -removable'; plate 116 by a spring 153, hearing at one;

endegainst a eollaron 'the'lockingplnnger; .r l"

' latte 'o'l'iii" 157 ahtl'theihacking' Wheels illfzs' ed iii Figure'i, fr'om' a description 15 1, and at theoth'ei eIi cl against the end of the sleeve extension 1 4-9. v cylinclri'eal' ea'p engages ever the sleeve extension 1 1-3) and isf'jqi ietl te' the lbekihg plunger I51, tfhefehfy upeii titwfa 'clpiilliiig motion of the '15s the; locking plunger 151 can bel eti'aeted f 'oin its engagement in the locking hbl'es I! The 'cap'" 154 also serves as a liltildle for swingingthe'j member 147, and

therebij the gear 136, upwardly or down} Wai'tlly iiito iiies'h wit-lithe selected gear on the shaft 98. The holes 152 retain thege'ars in mesh in-their selected gear ratio.

It will be notecl fidin Figures 2 and X that the forwai'ct end ofthe shaft- 98 has a sQHaYe-clp'toj estingeiitl 1 55 fertile i'eceii'tien of a suitable wh'eiieh, such as the" same Wrench for engagingth'e sqti aifed shanks 68-. BY liia'nhall'y rotating thesha' ft 98" i'ri this mamas the coi'i'tigating and basking" Wheels can li-l'o tatetl'tdfacilitate the 'ixis ertilf of thei st-ri p'f e iiig' the ceri ulga tiiig itheelsi i llsedheunted zi liait betiteii the b iiii hubs 108 aiatl 109is aseeeiid Weian4'fo1 CiiiYlflg-tll hacking Wheels the cerrugating Wheelsahcl backing wheel's thasheingclfiven ih' synehr'onisn'ie The clriviiigtoniieltibrr between the of Whi oh the driving; cemete ies for the ('61:- rugating" wheels W111 be" apparent; The

keyed on the letter" end dfa vefti'eiil chive shaft 1'59 which driVes*the"-backi1ig Wheel 61'. The raisecl tztble pbiitien 18 is formed with a clepehc'lihg bearilfg; 161* in which are x seemed bearing sleeir'es162 fejf mou'ntirig the shaft '159'; The ld'wer rediljee'd end 163" (if this drive shaft is alsii jiSu'riiallecl" in a bearing 1'64 in the bearing hanger 102; Key'ed to the drive shaft between{the Wonh Y Wheel I58 and the be a-i ing'lll isa 'spurgea'r 165 which meshes with a celrre'sphdihg spi'i'z V g'eaiel66 secured to the-lower e'n'dof the drive shaft-159 fOrthe otherwhee'l 61: This lattei' drive shaft is mounted" in another depending beaI'ing l'GQ'; similar to the bearin for the first-mentioned shaft} 159 Ali-ch e the 'table 1'8 eaeh shaft is providecl with a 'cellaT 167 over which is placed the backing wheel" (ST- 61', a nut-169' securing" the -Wl1eeI 'to' "the i shafti' The underside" of each ha'c'kin'g :Wheel isprovidecl with ahahn'ular gpe'ove for r'e'- CeiVing -the raees efzt'thrustball bearing 18;" Whieh be'ai's onth elevated table" portion 18 and carries'thethr'ust'and vibfating in'ei'cleht t6 theeiigagement of the cutter teeth"0n"th'e*- pertioh of stiip .stlppo'rtecl the wheel. The locking Wheel teeth may be formed direct-1y" 01f the" pe'ripl lerjyr Of -this/Wheel, but for aecommoclating' an adjust ing ring 186 I ingotstri'p ofplittere t Wi'dt s. The'per' ery of the backi ig' wheij iseutfjcloit n t for-Th an annulaifi recess I851 leavii'i'g lower s h'et lcleij 185 ring" 1861stheppclfdoivflinte this fe'eejss and restsi-e nf the shoulder 185'. This r ifig has aflablitmef t shoulder 18? against Which the ldwef e'clge (if the ship beats;

t0'othe&" ring 188 isthen; seeui e'd ever the beteen thereby afiord rollingeontaeti rig surfaces fof carrying part of tliiateral pressure im patted to the hacking Wheels61+6 1 in the cutting"ojie a tidhs; a .i l The drive to theftwb eolfl 'tigatihgwhieel's -95 is generally siniilaii td'that ass nted t6? the fe'eclihg" and baEk ifIig\tilieels161+61' The corrugating; ,ix li els are nfiolinteclf Oil shafts 17l aid 1 zl 'tlie latter shaft exte'nch cldwii-tliijbtigh b aifi hg I72 the beat: ing hahgerf-lOiB, fer nieun tiiig a worm wheel Wh'i'e'hmeshes"with the- Mirna 156. The fwd cdfriigati'iig fli lieels may" be gaied together ma ter eifeiasn e fesaiiig fax-1 am it is nete'ssaffthat" they" be (Then; "but is cutter eiiab les the tehsio'ri al stiength'i f;

(Figure; The

liu

theles's, it be desifab'lete shppleihen't' this resistance to lateral tleflectiorifhj atltli tiOIiaI' nieai sl Ihav'eYshdiiihtsIic'h additional ni'eansin" the fo r'iii of atljust'able areuate nesasca cation mentioned inthe forepart of this descriptiom While I have shown but this particular embodiment of my invention, it is tobe understood that many-changes may be made therein Without 'deparr ing from the spirit or scope of the invention.

hat I claim is:

1 In a machine of the class described, the combination of means-for'corrugating the stools strip, means for moving the strip through a or red path, and means for milling thethereof While said strip ismovingthrough a curved path.

'2; in a machine of the class described, the combination of meansfor corrugating the stockstrip,lmeans for cutting the edge of the strip, and means for guiding that portion ofthe strip being cut in a curved path during said cutting operation.

3. 1n mechanism for milling the edge of corrugated stip, thecombination of cutting means, and-means for guiding the strip in a curved'path past said cutting means.

a. In mechanism for milling the edge of corrugated: strip, the combination of cutting means, and a Wheel for guiding that portion of sa-idstrip being cutin a curved path during said cutting operation.

51in mechanism for milling the edge of corrugated strip, the-comb nation of cutting means, and a curved backing member for backing the portion of said strip being cut duiingthe cuttin operation.

6. lin-mechanisnr for milling the edge of a corrugated strip, thecombination of cutting means, and a toothed Wheel, located adjacent the cutting means and-on the opposite side of the striptherefrom, meshing with the corrugations in that portion of said strip being cut for ing :it' through. a curred-path during the cutting operation. v

7.111 a machine loflthe class described, the

combination of means for'corrugating:the

stock strip, a milling, cutter, a toothedwheel meshing with the corrugations insaid strip oppositethe cutting means and feeding said strip past said milling cutter, and means for driving said Wheel.

8. In a machine oi the class described, the combination of means for corrugating the stock strip, two milling cutters, and an individual guide wheel for each of said cutters for guiding the corrugating strip in a curved path past each cutter, each of said guide wheels being located adjacent its associated cutter and onthe opposite side of the strip from said cutter.

9. In a machine of the class described the combination of means for corrugating a stock strip, a first milling cutter, a cooperating feeding Wheel receiving the corrugated strip and remaining in contact therewith While feeding it past said cutter, a second backing up the strip and rac milling cutter for-cutting the other. side of said strip, a cooperatii feeding Wheel for on u and 18l11rtl11il1 "1n conta t witlrsaid driving the feeding Wheels so as to guide.

the strip first over one of said Wheels with one face engaged bythe-opposite cutter and subsequently over the other feeding wheel, with its-opposite face engaged by the cutter oppos te to the second Wheel,

11.1 11 a machine of theclass'described; the combination of a milling cutter, means for feeding corrugated strip past said milling cutter in a curved path substantially tangential-to the cylinder definedhy the rotating teeth of thecutter, and meansfor shifting said milling cutter longitudinally of its cutting position.

12. In a machine of the class described; the combination of a support,a-milling cutter, means for feeding a corrugated strip said millir cutter inacur-i ed path substantially tangential to the cylinder defined by the rotating teetlrof the cutter for cutting one edge of sa s rip, a mounting unit for saidcutter, and 15c formountsaid unit on said-support, said guide means permitting shifting motion of said mounting unit to change the position of'said cutter.

131 In a machine of the class described, the com'binationof a base, a millingcutter,

means for feeding corrugated" strip to said cutter: in: acurved path substantially tangential to thecylinder defined by the rotating teeth of he eutter', said cutter milling the edge ofsaid strip, an arbor for said m lling cutter, and a support forsa idarbor,

base.

14:. In a machine of the class described, the combination of a base, a raised table portion on said base, guide Wheels supported on said raised table portion for guiding a strip, and milling cutters supported on said base for engaging said strip at the Wheels While the strip is being guided by said Wheels.

15. In a machine of the class described, the combination of a base comprising a raised table portion, backing Wheels for guiding a corrugated strip, said wheels being mounted on said raised table portion, mounting units adjustably supported on said base to either side of said raised table portion. and milling cutters carried by said mounting units and adapted for milling aid support being movable'relative to said the stripiat the" wheels while said strip is in engagement: with said backing wheels.

16. Ina machineof they'class described,

I the combination of means for milling the m. l gated strip in a curved path past said cutte r, saidv wheel-actingon the race of the edge c t-a corrugated strip, a backingwhel el for guiding; the strip past saidmilling means, said wheel being disposed adjacent ceiving the thrust imposed upon the corrugated str p from said millingmeans,

Y 17. In a machine of the class described, the combination "Qf. a milling cutter, a

toothed backing wheelfor guiding a 'corru strip opposite the; milling cutter and adja cutter.

centthe same, and a disk below said wheel for receiving the; down thrust; imposed on saidstrip from the action of sa d milhng 11 8. In mechanism for milling the, edgev of corrugated strip, the combination of a 'backing Wheel, armi'lling cutter, the wheel being disposed-adjacent to the cutter'and acting on. the. face of the stripr which lies! away fromcthecutter, and. an arcuate guide ema bracing va portionof said backing wheel on theoutside of thestripdirectly below said milling cutter. r

19. In mechanism for milling the edge of corrugated strip, the combination of a millc ing. cutter, abacking wheel adapted'to re ceive thestrip 'andmove -it in a curved path f past saidflmil'ling cutter for milling one edge -thereof,-tl1e wheel' being disposed adjacent the cutter and acting-on the face'of thestrip which .lies away from the; cutter, and a shoulder r'otating w-ith said backing wheel for backing up the-other edge, of said strips 20. In mechanism for milling the edgeofcorrugated strip, the combination ocf amillmg cutter, a backing'wheel adaptedtoreceive the strip and move itfin a curved patlipast said milling cutter for; milling one edge thereof, the wheel being disposed adj a;

; and a ring carried by said backingdwheel 5 1 being adaptedifor ready substitution fbv.

corrugated strip past and in -engagement the cutter teeth.

a corruga ed strip, means'tor movingfthe' v any. name this: 17th davof;September, 1192 cent tlie'cutter and acting on'the (:face of r the istripjwhich comprising a shoulder adapted} to 5 back p, the other edgeof said strip ,said;ring being; adapted for ready substitution: other i rings having their shoulders. atgdi'fi'erent heights. Y 1 I- 1:2 21'. In mechanism for milling the edge of corrugated strip, the "combination of a millj' ringcutter, a-backing wheel adapted'to res" f ceive the-strip and move it in a curved path- 1 past said millingcutten forimilling one edge thereot, the 7 wheel being disposed jadj acentb the cutter and act-ing'on the face of thestr'ipf which: lies away from the cutter, said back ing wheel having a houldered recessformed: around its per;iphery,}-ia.: backing j-ringflrei ceivable in said "recess, said backing: ring having an annular wshoulder adaptedito'back up the other edge 7 of, said, strip,-said ring other rings havingbacking shoulders atildif Y i ferent heights, and a a toothed ring detach-1 f 1 ably secured to'said backingwhel andover-i lying said backing ring. 22. In an apparatusjoithe-classdescribed, a milling "cutter andfmeans, for moving a, v

with said cutter 'whileflin'. bowed formation the better to resist the lateral f force compo; nent of the stress'exeited' on thefstripjby 23, In an apparatus ofthecla ssldescribe a milling. cutter foractillg upon 'af-n edge-of a. corrugated strip, lme'ans; liar,- r'n olving" the strip past the cutter, andfmeans continuousy a ta n g t tri .;,po1;n0a i being' sa milled in bowed formation. f- 24,; In an apparatus'of the class described,' a milling cutter (for acting upon, anedge. of r f stripgpast the cutter, and means continue ously -maintaining the strip {portion .being milled in bowed formation with the convex" surface of the .bowiprese'njted to the cutter g In Witness whereof, IT hereunto subscrib CAREMWE 

